The table below summarises the plug types, voltage and frequency of electrical current in both Nauru and Guinea-Bissau.
| Nauru | Guinea-Bissau | |
|---|---|---|
| Plug Types | I | C |
| Voltage | 240V | 220V |
| Frequency of electrical current | 50Hz | 50Hz |
Nauru uses Plug Type I.
You will need this adaptor:
Socket Type
(Nauru) to Plug Type C
(Guinea-Bissau)
The voltages found in Nauru (240V) and Guinea-Bissau (220V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency found in Nauru and Guinea-Bissau is exactly the same (50Hz). Timing devices and appliances that use motors will function as expected under this frequency.